The error traceback is the full text of the error message that pops up. Also echoed in the log when running calibre in debug mode (from the command prompt, "calibre-debug -g").
I initially thought this must be a linux issue, but I can't be sure anymore
-- I usually assume any linux user is likely to have some skill at basic modification of source code files unless otherwise stated.
You can unzip the plugin file and edit the *.py files as needed...
Not to worry, though -- this should be fixed by the plugin maintainer soon.